New York Rangers

Moore began his professional career in the 2003–04 season, split between the New York Rangers and their minor league affiliate, the Hartford Wolf Pack of the American Hockey League (AHL). He made his NHL debut on November 1, 2003, against the Montreal Canadiens, where he tallied three assists in a 5–1 victory. He became the second player to score three points in his NHL debut with the Rangers, joining George Allen, who did so in 1938. Moore spent the majority of the season with the Wolf Pack. During the 2004–05 NHL lock-out, Moore remained with the Wolf Pack, finishing third on the team in scoring for the year.^[4]

Moore rejoined the Rangers at the start of the 2005–06 season, where he was placed on a defensive-minded line with Jed Ortmeyer and Ryan Hollweg. Through minor line-changes throughout the year, Moore continued his solid defensive play and continued to improve.^{[citation needed]}

Pittsburgh Penguins, Minnesota Wild

On July 19, 2006, the Rangers traded Moore to the Pittsburgh Penguins in a three-team trade. During his tenure with the team, he recorded 15 points in 59 games.^{[citation needed]}

On February 27, 2007, the Penguins traded Moore to the Minnesota Wild for a 2007 third-round draft pick. Moore finished the season with 17 points in 69 games.^{[citation needed]}

Toronto Maple Leafs, Buffalo Sabres

On January 11, 2008, the Toronto Maple Leafs claimed Moore off of waivers from the Wild. His debut with the Maple Leafs came on January 12, 2008, against the San Jose Sharks. He was assigned to centre Toronto's top scoring line alongside left winger Jason Blake. On March 4, 2009, Moore was traded by Toronto to the Buffalo Sabres in exchange for a second-round draft pick.^[5] At the end of the 2008–09 season, he finished with career-highs in goals (13), assists (32) and points (45) in what remains his highest-scoring season to date.^[6]

Florida Panthers, Montreal Canadiens

On October 4, 2009, Moore signed a one-year, $1.1 million contract with the Florida Panthers.^[7] Halfway through the season, on February 11, 2010, he was traded to the Montreal Canadiens in exchange for a second-round draft pick in 2011.^[8] In the 2010 Stanley Cup playoffs, Moore scored the series-winning goal as the eighth-seeded Canadiens eliminated the Presidents' Trophy-winning Washington Capitals,^[9] and scored again in game 7 against the Penguins,^[10] though Montreal later lost the Eastern Conference Finals to the Philadelphia Flyers.^{[citation needed]}

Tampa Bay Lightning, departure from hockey

Becoming a free agent following the season, Moore signed with the Tampa Bay Lightning on a two-year, $2.2 million contract.^[11] For the second-straight year, Moore reached the Eastern Conference Finals, though his team again was defeated, this time to the eventual Stanley Cup champions, the Boston Bruins.^{[citation needed]}

On February 10, 2012, during the 2011–12 season, Moore was fined $2,500 for an interference infraction that injured the New York Rangers' Ruslan Fedotenko. On February 16, Moore was traded to the San Jose Sharks, along with a seventh-round draft pick, in exchange for a second-round pick. With the trade, it marked Moore's ninth NHL club and the seventh time in his career he has been traded.^[12]

Moore played just the first three games of the Sharks in the 2012 playoffs after learning his wife, Katie, had been diagnosed with liver cancer. He sat out the 2012–13 season to tend to Katie, who died in January 2013.^[13]

Return to the Rangers

He returned to hockey in the 2013 off-season by signing a one-year contract with the Rangers, the team that first drafted him in 2000.^[14]

Moore would be a crucial piece of the Rangers' deep 2014 playoff run, and his perseverance in returning after a tragic loss earned him the Bill Masterton Memorial Trophy.^[15] Reaching the Eastern Conference Finals for the third time in his career, Moore finally reached the Stanley Cup Finals after scoring the only goal of Game 6 against the Montreal Canadiens, sending the Rangers to their first Final in 20 years.^[16] The Finals, however, would be won in five games by the Los Angeles Kings.^{[citation needed]}

On July 1, 2014, Moore re-signed with the Rangers on a two-year, $3 million contract.^{[citation needed]}

Boston Bruins

After a successful three-year tenure with the Rangers, Moore as a free agent opted to join his 10th NHL club, in agreeing to a one-year contract with the Boston Bruins on August 30, 2016.^[17] In his lone season with the club, Moore recorded 25 points in 82 games.^{[citation needed]}

Return to the Maple Leafs

On July 1, 2017, Moore, as a free agent, signed a one-year, $1 million contract to return for a second stint with the Maple Leafs.^[18] Early in the season, Moore battled with Eric Fehr for fourth-line centre role in Toronto, effectively winning the spot after the Maple Leafs waived Fehr in late October.^[19][20]

ZSC Lions

As a free agent from the NHL, Moore opted to continue his career abroad, joining Swiss club the ZSC Lions of the National League for the remainder of the season on a one-year contract on January 7, 2019.^[21]